Overview. Complex carbohydrates are made up of sugar molecules that are strung together in long, complex chains. Complex carbohydrates are found in foods such as peas, beans, whole grains, and vegetables.
Confidence votes 11.2K. Taught College level A&P for 27 years. The lens in the human eye is a convex lens, but it is flexible and when it is acted on by the ciliary muscle around it, the lens can be flattened to change the focus, or, when the muscle is relaxed, the lens can assume a more spherical shape.
The lens is attached via the suspensory ligaments to the ciliary muscles, which in turn are attached to the sclera. These muscles form a ring around the inside of the eye, so when they are relaxed, the tension on the suspensory ligaments is greater. Consequently, the lens is flatter and refracts less.